Using Swagger2 to build Restful API in Spring MVC

Configuration in Spring MVC configuration file

<!-- 设置使用注解的类所在的jar包，只加载controller类 -->  
<context:component-scan base-package="com.jay.plat.config.controller" />

<!-- 使用 Swagger Restful API文档时，添加此注解 -->  
    <mvc:default-servlet-handler />

<mvc:resources mapping="swagger-ui.html" location="classpath:/META-INF/resources/"/>  
<mvc:resources mapping="/webjars/**" location="classpath:/META-INF/resources/webjars/"/>

maven dependency

<!-- 构建Restful API -->  
          
        <dependency>  
            <groupId>io.springfox</groupId>  
            <artifactId>springfox-swagger2</artifactId>  
            <version>2.4.0</version>  
        </dependency>  
        <dependency>  
            <groupId>io.springfox</groupId>  
            <artifactId>springfox-swagger-ui</artifactId>  
            <version>2.4.0</version>  
        </dependency>

Swagger configuration file

package com.jay.plat.config.util;  
  
import org.springframework.context.annotation.Bean;  
import org.springframework.context.annotation.ComponentScan;  
import org.springframework.context.annotation.Configuration;  
import org.springframework.web.servlet.config.annotation.EnableWebMvc;  
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;  
  
  
import springfox.documentation.builders.ApiInfoBuilder;  
import springfox.documentation.builders.PathSelectors;  
import springfox.documentation.builders.RequestHandlerSelectors;  
import springfox.documentation.service.ApiInfo;  
import springfox.documentation.spi.DocumentationType;  
import springfox.documentation.spring.web.plugins.Docket;  
import springfox.documentation.swagger2.annotations.EnableSwagger2;  
/* 
 * Restful API 访问路径: 
 * http://IP:port/{context-path}/swagger-ui.html 
 * eg:http://localhost:8080/jd-config-web/swagger-ui.html 
 */  
@EnableWebMvc  
@EnableSwagger2  
@ComponentScan(basePackages = {"com.plat.config.controller"})  
@Configuration  
public class RestApiConfig extends WebMvcConfigurationSupport{  
  
    @Bean  
    public Docket createRestApi() {  
        return new Docket(DocumentationType.SWAGGER_2)  
                .apiInfo(apiInfo())  
                .select()  
                .apis(RequestHandlerSelectors.basePackage("com.jay.plat.config.controller"))  
                .paths(PathSelectors.any())  
                .build();  
    }  
  
    private ApiInfo apiInfo() {  
        return new ApiInfoBuilder()  
                .title("Spring 中使用Swagger2构建RESTful APIs")  
                .termsOfServiceUrl("http://blog.csdn.net/he90227")  
                .contact("逍遥飞鹤")  
                .version("1.1")  
                .build();  
    }  
}

Configuration instructions:

@Configuration 配置注解，自动在本类上下文加载一些环境变量信息  
@EnableWebMvc   
@EnableSwagger2 使swagger2生效  
@ComponentScan("com.myapp.packages") 需要扫描的包路径

Use annotations in Controller Add API document

package com.jay.spring.boot.demo10.swagger2.controller;  
  
import java.util.ArrayList;  
import java.util.Collections;  
import java.util.HashMap;  
import java.util.List;  
import java.util.Map;  
  
import org.springframework.web.bind.annotation.PathVariable;  
import org.springframework.web.bind.annotation.RequestBody;  
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.RequestMethod;  
import org.springframework.web.bind.annotation.RestController;  
  
import com.jay.spring.boot.demo10.swagger2.bean.User;  
  
import io.swagger.annotations.ApiImplicitParam;  
import io.swagger.annotations.ApiImplicitParams;  
import io.swagger.annotations.ApiOperation;  
  
@RestController  
@RequestMapping(value = "/users") // 通过这里配置使下面的映射都在/users下，可去除  
public class UserController {  
  
    static Map<Long, User> users = Collections.synchronizedMap(new HashMap<Long, User>());  
  
    @ApiOperation(value = "获取用户列表", notes = "")  
    @RequestMapping(value = { "" }, method = RequestMethod.GET)  
    public List<User> getUserList() {  
        List<User> r = new ArrayList<User>(users.values());  
        return r;  
    }  
  
    @ApiOperation(value = "创建用户", notes = "根据User对象创建用户")  
    @ApiImplicitParam(name = "user", value = "用户详细实体user", required = true, dataType = "User")  
    @RequestMapping(value = "", method = RequestMethod.POST)  
    public String postUser(@RequestBody User user) {  
        users.put(user.getId(), user);  
        return "success";  
    }  
  
    @ApiOperation(value = "获取用户详细信息", notes = "根据url的id来获取用户详细信息")  
    @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long")  
    @RequestMapping(value = "/{id}", method = RequestMethod.GET)  
    public User getUser(@PathVariable Long id) {  
        return users.get(id);  
    }  
  
    @ApiOperation(value = "更新用户详细信息", notes = "根据url的id来指定更新对象，并根据传过来的user信息来更新用户详细信息")  
    @ApiImplicitParams({ @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long"),  
            @ApiImplicitParam(name = "user", value = "用户详细实体user", required = true, dataType = "User") })  
    @RequestMapping(value = "/{id}", method = RequestMethod.PUT)  
    public String putUser(@PathVariable Long id, @RequestBody User user) {  
        User u = users.get(id);  
        u.setName(user.getName());  
        u.setAge(user.getAge());  
        users.put(id, u);  
        return "success";  
    }  
  
    @ApiOperation(value = "删除用户", notes = "根据url的id来指定删除对象")  
    @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long")  
    @RequestMapping(value = "/{id}", method = RequestMethod.DELETE)  
    public String deleteUser(@PathVariable Long id) {  
        users.remove(id);  
        return "success";  
    }  
  
}

Effect display

Access path:

Restful API 访问路径:  
 * http://IP:port/{context-path}/swagger-ui.html  
 * eg:http://localhost:8080/jd-config-web/swagger-ui.html

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